There are 2 ways to control OnTheAir Video or OnTheAir Video Express from a production switcher, depending on the brand you use.

with most production switcher this will be done through our GPICommander box

if you own an ATEM production switcher from Blackmagic-Design®, or a Tricaster from NewTek® this can be done simply through Ethernet connection

Using GPICommander

The idea here is that you will use the GPI/Tally output of your production switcher (what you use to indicate to the presenter if his camer is "on or not"). You will connect that GPI output to our GPICommander box. GPI Commander is a device that you connect in USB to your computer and that has 8 outputs and 24 inputs.

If you have an ATEM or a Tricaster, then it's even easier than that. Since OnTheAir Video and OnTheAir Video Express 3.3.1 it is possible to do that with just a Network connection. So here it is:

make sure that your ATEM or TRicaster is within the same network as your computer with OnTheAir Video

for the ATEM install the same driver on your Mac corresponding to the firmware that your ATEM is using. So first make sure of the firmware used by the ATEM, and then install the same drivers on your Mac. (or upgrade the firmware if needed)

go to the OnTheAir Video preferences and select Mixer:

Enable the checkbox to "User an external video mixer to trigger the playback

Enter the IP address to the ATEM or Tricaster

Select the input that you want OnTheAir Video to monitor

The behaviour will be as follows:

as soon as OnTheAir Video sees that the monitored input is selected in your ATEM or Tricaster, it will start playing the selected (or cued) clip in the front playlist

then when the monitored input is deselected in the ATEM or Tricaster, and

if the "Stop clip when switching off", we will stop the playback of the clip.

if the "Cue next clip automatically" option is enabled, we will automatically cue the next clip.

if none of the option is selected, nothing will happen when you deselect.